Move Media Galleries FileAPI code out of webkit.

webkit/fileapi/media/mtp_device_async_delegate.h

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_FILEAPI_MEDIA_MTP_DEVICE_ASYNC_DELEGATE_H_
-#define WEBKIT_FILEAPI_MEDIA_MTP_DEVICE_ASYNC_DELEGATE_H_
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
-#include "webkit/fileapi/async_file_util.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace fileapi {
-
-// Asynchronous delegate for media transfer protocol (MTP) device to perform
-// media device isolated file system operations. Class that implements this
-// delegate does the actual communication with the MTP device.
-// ScopedMTPDeviceMapEntry class manages the lifetime of the delegate via
-// MTPDeviceMapService class. Member functions and callbacks runs on the IO
-// thread.
-class MTPDeviceAsyncDelegate {
- public:
-  // A callback to be called when GetFileInfo method call succeeds.
-  typedef base::Callback<
-      void(const base::PlatformFileInfo& file_info)> GetFileInfoSuccessCallback;
-
-  // A callback to be called when ReadDirectory method call succeeds.
-  typedef base::Callback<
-      void(const AsyncFileUtil::EntryList& file_list,
-           bool has_more)> ReadDirectorySuccessCallback;
-
-  // A callback to be called when GetFileInfo/ReadDirectory/CreateSnapshot
-  // method call fails.
-  typedef base::Callback<
-      void(base::PlatformFileError error)> ErrorCallback;
-
-  // A callback to be called when CreateSnapshotFile method call succeeds.
-  typedef base::Callback<
-      void(const base::PlatformFileInfo& file_info,
-           const base::FilePath& local_path)> CreateSnapshotFileSuccessCallback;
-
-  // Gets information about the given |file_path| and invokes the appropriate
-  // callback asynchronously when complete.
-  virtual void GetFileInfo(
-      const base::FilePath& file_path,
-      const GetFileInfoSuccessCallback& success_callback,
-      const ErrorCallback& error_callback) = 0;
-
-  // Enumerates the |root| directory contents and invokes the appropriate
-  // callback asynchronously when complete.
-  virtual void ReadDirectory(
-      const base::FilePath& root,
-      const ReadDirectorySuccessCallback& success_callback,
-      const ErrorCallback& error_callback) = 0;
-
-  // Copy the contents of |device_file_path| to |local_path|. Invokes the
-  // appropriate callback asynchronously when complete.
-  virtual void CreateSnapshotFile(
-      const base::FilePath& device_file_path,
-      const base::FilePath& local_path,
-      const CreateSnapshotFileSuccessCallback& success_callback,
-      const ErrorCallback& error_callback) = 0;
-
-  // Called when the
-  // (1) Browser application is in shutdown mode (or)
-  // (2) Last extension using this MTP device is destroyed (or)
-  // (3) Attached MTP device is removed (or)
-  // (4) User revoked the MTP device gallery permission.
-  // Ownership of |MTPDeviceAsyncDelegate| is handed off to the delegate
-  // implementation class by this call. This function should take care of
-  // cancelling all the pending tasks before deleting itself.
-  virtual void CancelPendingTasksAndDeleteDelegate() = 0;
-
- protected:
-  // Always destruct this object via CancelPendingTasksAndDeleteDelegate().
-  virtual ~MTPDeviceAsyncDelegate() {}
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_MEDIA_MTP_DEVICE_ASYNC_DELEGATE_H_